Electric semaphore.



PATENTED OCT. 3', 1905.

C. E. FRBDERICKSON. ELECTRIC SEMAPHORE.

APPLICATION FILED JAN.23,1905.

4 SHEETS-SHEET 1.

WITNESSES:

No. 801,190. PATENTBD OCT. 3,1905. 0. B. FREDERIGKSON.

ELECTRIC SEMAPHORE.

APPLICATION FILED 51111.23, 1905.

4 SHEETS-SHEETS.

INI/EIVTOR No. 801,190.- PATENTED 001. 3,1905.

0. E. FREDERIGKSON. ELECTRIC SBMAPHORB.

APPLICATION EILED JAN.231905.

4 SHEETS-SHEET 4.

By -07? I76;

ATTORNEYS.

WITNESSES.

rrnn STATES PATENT OFFICE.

CLAYTON E. FREDERIOKSON, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TOJEAN F. WVEBB, OF DENVER, COLORADO.

ELECTRIC SEIVIAPHORE.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed January 23, 1905. Serial No. 242,361.

To (oi/Z whom it may concern,-

Be it known that I, CLAYTON E. FREDERICK- SON, residing at Denver, inthe county of Denver and State of Colorado, have invented certain newand useful Improvements in Electric Semaphores, of which the followingis a specification.

My invention relates to certain new and useful improvements insemaphores for use in connection with railway systems; and it moreparticularly relates to that class of semaphore mechanisms in whichlocking devices are provided for holding the semaphore-arm in its normalor safety position and in which electromagnetically-operated means areprovided for releasing such lock devices to permit the semaphore beingmoved to its danger position and at the same time operate a signal inthe tower-house to inform the operator that the semaphore has beenproperly set or moved to its danger position.

Primarily my invention has for its object to provide a semaphore of thisclass of a very simple nature, which can be readily manufactured at aminimum cost, and which will be positive in its operation andeffectively serve its intended purposes.

Again, the invention seeks to provide a device of this character inwhich all the operating parts are so arranged that ready access may behad thereto whenever it may be found desirable to inspect such parts orto insert or remove a signal-lamp.

In its generic nature my invention comprises suitablesupporting-standards, upon which a semaphore-arm is pivotally mountedand upon which locking devices are mounted for cooperating with thesemaphore-arm to hold it in its normal or safety position. Upon thestandards I also mount electromagnetic lock devices and circuit-closingdevices for operating the lock devices to release them from theiroperative connection with the semaphore-arm. Means are also providedwhereby a supplemental circuit is closed when the semaphore-arm moves toits danger positionto indicate to the operator in the signaltower thatthe arm has been set to the proper position.

My invention also includes a rotatablymounted casing having signal-lightapertures, which is so mounted as to rotate with the semaphore-arm tobring its signal-light apertures in register with a suitable lamp heldwithin the casing on a suitable bracket carried by thesupporting-standards.

With other objects in view than have been heretofore enumerated theinvention also includes certain novel construction, combination, andarrangement of parts which will be first described in detail and thenspecifically pointed out in the appended claims, reference being had tothe accompanying drawings, in whicl1- Figure l is a perspective viewofmy improved semaphore. Fig. 2 is a vertical longitudinal sectionthereof, showing the parts with the semaphore arm and blade in theirnormal or safety position. Fig. 3 is a similar view, the parts beingshown in their danger-indicating position. Fig. 4 is a verticalcross-section on the line 4 4 of Fig. 2. Fig. 5 is a perspective view ofthe semaphore mechanism with the housing removed. Fig. 6 is adiagrammatic view showing the arrangement of the electric circuits whenparts are in the safety position. Fig. 7 is a similar view showing thearrangement of the electric circuit when the parts are in the dangerposition.

Referring now to the accompanying drawings, in which like numerals andletters of reference indicate like parts in all of the figures, l 1designate the upright supporting bars or standards, preferablyconstructed of iron and which are arranged parallel to one another andterminate at the bottom in the downwardly-extending angled portions 1 1and the downwardly-extending ends 1 1 which straddle over thesupporting-posts 33, to which they are firmly secured by the screws 3434 and the bolts 35 35, as clearly shown in Fig. 4. Fulcrumed on a pivot3, held between the supporting-standards 1 l, is a semaphore-arm 2,which carries the semaphore' blade 2 at its outer end and to which thearc bar 21 is secured by the irons 21 21 and the rivets or bolts 21 21as clearly shown in the drawings. The bar 21 is bent in the arc of acircle, having as its center the pivot-point 3 of the arm 2, and thesaid bar 21 passes between the upper ends of the standards 1 1. Near thetop ends of the standards 1 1 and between the same I mount afriction-roller 19 on a spindle 20, and the roller 19 engages with thearc bar 21 to steady the same and hold it in engagement with thetumbler-lock 16, here- 7 inafter again referred to. On the under sidethe bar 21 is provided with an elongated notch 22 to receive the rockingtumbler 16, which is pivotally mounted in bearings in the standards 1 1below the arc bar 21, and the tumbler 16 has a flat portion 16 to permitit to become released from the bar 21 when it is turned on its axis, aswill be hereinafter more fully understood. The shaft 16 of the tumbler16 has a squared end 16 to receive the lever 17. To the other end of thesaid lever 17 the pitman 18 is pivotally attached. Fulcrumed at 15 tothe standards 1 1 is a second lever 14, which passes between suchstandards 1 1 and is pivotally connected at one end with the rod 18,while at its other or free end the lever 14: carries an armature 13 forcooperating with the electromagnet 12. The electromagnet 12, hereinaftertermed the releasing-magnet, is mounted on a bracket 12, which is inturn vertically adjustably mount-- ed on the standardsl 1 by the bolts12 12", which pass between such standards 1 1 and are secured by thenuts 12 12, as clearly shown in Fig. 2.

Below the magnet 12 and near the pivot 3 I screw a pair of U-shapedbracket members 5 5 to the standards 1 1, and these members 5 5 form thesupport for the supplemental signal-operating mechanism hereinafteragain referred to. Mounted between the upper portion of the members 5 5is an electromagnet6 6, which cooperates with the armature portion 8 ofthe angled armature member 8 The member 8 is fulcrumed at 8 between thebrackets 5 5 below the magnet 6 and is held from dropping downwardlybeyond a certain limit by the stop 19, which is also secured between thebracket members 5 5.

1O designates a block of insulating material to which a contact-spring 9is secured, and the spring 9 is also in contact with the bindingpost 9on the insulating-block 10, to which one wire 47 of the supplementalreturn signal-circuit is attached, the other wire 18 of said bracketbeing attached at one end to the armature member 8 and grounded at itsother end, as at g.

The terminal ends 6 6 of the electromagnet 6 are connected withbinding-posts 7 7, mounted on an insulating-block 11, secured betweenthe bracket members 5 5. One of the terminal ends of thereleasing-magnet 12 is connected to the binding-post 7 through the wire45, while the other end is connected, through wire &6, to line-wire 16,which is in turn connected to the contact-point 36 of a switch S in thesignal-tower T. (See Fig. 6.) The other post 7 is connected by wire 15with the line-wire 45, which in turn is connected to the switch-point 36of the switch S. The switch S has its two blades 38 38 pivotallymounted, as at 38 38, and connected to move in unison by theinsulating-strip 38*, to which the finger-knob 36 is attached. Thebattery 37 is connected by wire 39 39 to the two blades 38 38 of theswitch S, as clearly shown in Fig. 6.

The releasing-magnet 12 and the magnet 6 are connected in series witheach other in the main circuit, which contains the switch S and thebattery 37.

The supplemental circuit, which contains the circuit-closing members 8and 9, also contains a signal device 40, which may be in the nature of abell or other suitable signal mechanism, and also includes a cut-outswitch 41 and a supplemental battery 42, as clearly showndiagrammatically in Fig. 6.

23 designates a dash-pot secured to a bracket 23, which bracket 23 isvertically adjustably mounted on the standards 1 1 by the bolts 23,which pass between the standards 1 1 and are secured by the nuts 23 andwashers 23 that cooperate therewith. The piston 24? of the dash-pot 23is pivotally connected at 2 1 to a pitman 24, which is in turn pivotally connected at 2 1 to the arm 2. The dash-pot 23 and its connection withthe arm serves to prevent said arm 2 from moving too suddenly to eitherits safety or danger position, and it also serves to hold the arm downin its danger position after it is once moved to said position andprevent its being accidentally elevated to the safety position.

At its inner end the arm 2 carries a pawl &, which is pivoted thereto,as at 1, and which includes a heel portion 4;, that engages with thearmature portion 8 of the armature member 8 as the arm 2 drops, andthereby raises the armature 8 to rock the armature member and bring itinto engagement with the contact-spring 9 to close the supplementalcircuit, the armature 8 being then held in such position by theholding-magnet 6. It should be understood that the magnet 6 does not ofitself draw up the armature 8, but merely serves to hold it in itscircuit-holding position after the armature 8 has been raised by the arm2 and as long as current is flowing into the main circuit.

26 designates a casing or housing of metal which comprises the side wall26 26" and the peripheral rim 27 which rim 27 is preferably formed insections hinged together, as at 27, to form doors 27 27", whereby readyaccess can be had to the interior of the casing. The doors 27 27 x aresecured together by the hasp 29, staple 28, and lock 50, as shown. Theside walls 26 26 of the casing are secured together at their centers bythe bolts or shafts 26 26, which are screwed into the ends of the pivotmember 3 and which have their outer ends threaded, as at 26 26 toreceive the securing-nuts 27 i 27 The arm 2 passes through a peripheralaperture 27 of the rim 27, so that the casing 26 and the arm 2 will movetogether in unison on their pivot-axis. The rim of the casing isslotted, as at 27, to permit passage of the standards 1 1.

31 31 designate openings in the wall 26" 26 of the casing 26, and thesaid openings are closed by the glass windows 32 32, which may be andpreferably are of colored glass to indicate a danger-signal. Within thecasing and at the bottom thereof is a bracket 25, secured to thestandards 1 1, and the bracket 25 has a lamp-receiving member 25* at itsfree end, upon which the signal-lamp L is set. The lamp L is so arrangedthat it is below the horizontal plane containing the axis of the pivot3, so that when the parts are in their normal or safety position (shownin Fig. 2) the lamp will be invisible, and when the parts are in theirdanger-indicating position (shown in Fig. 3) the windows 32 32 will bein alinement with the lamp L to show a danger-signal position.

Operation: The manner in which my invention operates can be bestexplained by reference to Figs. 2, 3, and 6 of the drawings, andassuming the parts to be in the position shown in Fig. 2, which is thesafety position, the arm 2 being locked in its safety position by havingthe tumbler 16 engaging with the notch 22 and the main circuit beingbroken at the switch S, while the supplemental circuit is open atcontacts 9 and 8 and also at the switch 41, when it is desired to setthe semaphore to indicate a danger-signal, as shown in Fig. 3, the toweroperator closes the switch S, thereby causing a current to flow in themain circuit from battery 37 to energize the releasing-magnet 12 and theholding-magnet 6. As the magnet 12 becomes energized it attracts itsarmature 13, and thereby rocks lever 14, which rocking motion iscommunicated to lever 13 by the pitman 18 to turn the tumbler l6 andbring its flat faces 16 to register with the rod 21. This releases therod 21 and permits the semaphore-arm to fall, carrying the casing withit and turning the casing on its pivot-axis until the windows 32 32 arein alinement with the signal-lamp L. As the arm 2 falls the dog 4engages the armature 8 of the armature member 8 and raises it until themember 8 engages the contact-spring 9, thereby closing the supplementalcircuit at such point. As the armature engages the magnet 6 the dog 4cpasses over the end of the armature 8, and the parts will then be in theposition shown in Fig. 3. The operator next closes the supplementalcircuit at the switch 41, and thus causes the current from battery 42 toflow and operate signal 40 in the tower-house so long as thesupplemental circuit is closed at contacts 8 and 9. This indicates tothe tower operator that the arm 2 has fallen to its danger-indicatingposition. The tower operator next breaks the main circuit at switch S,which allows the magnets 12 and 6 to become deenergized, thus releasingtheir armatures 13 and 8*, respectively. The armature 8 will immediatelyfall down and be arrested in its motion by the stop 49. As the arm 2 isagain returned to its normal or safety position, either by hand orotherwise, and the notch 22 again brought opposite the tumbler 16 theweight of the armature 13 will cause the lever 14 to rock, therebyimparting its motion through pitman 18 to lever 17 to cause the tumbler16 to again rock back to its locking position, as shown in Fig. 2. Thearm and casing may be rotated back to their normal or safety positioneither by hand or in any suitable manner. As soon as the arm 2 is againraised the casing 26 is again returned to its normal position, and theparts will then be in their safety position, as shown in Fig. 2.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the complete construction,operation, and many advantages of my invention will be readily apparentto those skilled in the art to which it appertains, and I desire itunderstood that slight changes in the detailed arrangement andconstruction of parts may be made without departing from the scope ofthe invention or the appended claims.

Having. thus described my invention, what I claim, and desire to secureby Letters Patout, is

1. A semaphore comprising a pivotallymounted semaphore-arm, means forlocking said arm to its safety position, electromagnetic devices forreleasing said locking means, an indicating-circuit, an indicator and asource of electric energy in said indicating-circuit, a circuit-closerin said indicating-circuit closable by the arm of the semaphore, a maincircuit, a source of electric energy for said main circuit, anelectromagnet in said main circuit for holding said circuit-closerclosed, substantially as shown and described.

2. A semaphore comprising a pivotallymounted semaphore-arm, means forlocking said arm to its safety position, electromagnetic devices forreleasing said locking means, an indicating-circuit, an indicator andsource of electric energy in said indicating-circuit, a circuit-closerin said indicating-circuit closable by the arm of the semaphore, a maincircuit, a source of electric energy for said main circuit, anelectromagnet in said main circuit for holding said circuit-closerclosed, a casing for said releasing means, said closer and itsholding-magnet, said casing having windows all being rotatably mountedto turn in unison with said arm, and a signal-light mounted within saidcasing substantially as shown and described.

3. A semaphore-signal comprising a supporting-standard, a casingrotatably mounted thereon, said casing having windows, a lamp mounted onsaid standard within the casing, means for normally locking said casingfrom rotation with its windows out of register with the signaling-lamp,means for releasing said locking means and means for rotating saidcasing to bring its windows in register with said lamp substantially asshown and described.

4. A semaphore-signal comprising a supporting-standard, a casingrotatabl y mounted thereon, said casing having windows, a lamp mountedon said standard within the casing, means for normally locking saidcasing from rotation with its windows out of register with thesignaling-lamp, means for releasing said locking means and means forrotating said casing to bring its windows in register with said lamp,and electromechanical means within the casing for operating a distantindicator substantially as shown and described.

5. A semaphore-signal comprising a supporting-standard, a casingrotatably mounted thereon, said casing having windows, a lamp mounted onsaid standard within said casing, means for normally locking said casingfrom rotation with its windows out of register with the signal-lamp,electromechanical mechanism mounted within the casing for releasing saidlocking means, and means for rotating said casing to bring its windowsin register with said lamp, substantially as shown and described.

6. A semaphore-signal comprising a supporting-standard, a casingrotatably mounted thereon, said casing having windows, a lamp mounted onsaid standard within said casing, means for normally locking said casingfrom rotation with its windows out of register with the signal-lamp,electromechanical mechanism mounted within the casing for releasing saidlocking means, and means for rotating said casing to bring its windowsin register with said lamp, a supplemental electromechanical meanswithin the casing for operat ing a distant indicator when the casing hasbeen rotated substantially as shown and described.

7. A semaphore-signal comprising a supporting-standard, a casingrotatabl y mounted thereon, said casing having windows, a lamp mountedon said standard within said casing, means for normally locking saidcasing from rotation with its windows out of register with thesignal-lamp, electromechanical mechanism within the casing for releasingsaid locking means, and means for rotating said casing, to bring itswindows in register with said lamp, said electromechanical mechanismincluding a rotary tumbler-lock, and an electromagnet, a main circuitincluding a source of electric energy in which said magnet is connected,and a switch in said circuit for making and breaking the circuitsubstantially as shown and described.

8. A semaphore-signal comprising a supporting-standard, a casingrotatably mounted thereon, said casing having windows, a lamp mounted onsaid standard within said casing, means for normally locking said casingfrom rotation with its windows out of register with the signal-lamp,electromechanical mechanism within the casing for releasing said lookingmeans, and means for rotating said casing, to bring its windows inregister with said lamp, said electromechanical mechanism ineluding arotary tumbler-lock, and an electromagnet, a main circuit including asource of electric energy in which said magnet is connected, and aswitch in said circuit for making and breaking the circuit, asupplemental electromechanical means within the casing controlled bymovement of the casing and by the main circuit for operating a distantindicator substantially as shown and described.

9. A. semaphore comprising supportingstandards, an arm having asignal-blade fulcrumed to said standard, locking devices for holdingsaid arm in one position, said arm being gravity-movable to anotherposition, a main electric circuit including a source of electric energyand a cut-out switch, an electromagnet in said main circuit forreleasing said locking device, a supplemental electric circuit includinga source of electric energy and an indicator, a circuit-closer carriedby said standard and connected in said supplemental circuit, meanscarried by the arm for moving said circuit-closer to its closed positionat times, a holding-magnet in the main circuit for holding saidcircuit-closer in said closed position substantially as shown anddescribed.

10. A semaphore comprising supportingstandards, an arm having asignal-blade fulcrumed to said standard, locking devices for holdingsaid arm in one position, said arm being gravity-movable to anotherposition, a main electric circuit including a source of electric energyand a cut-out switch, an electromagnet in said main circuit forreleasing said locking devices, a supplemental electric circuitincluding a source of electric energy and an indicator, a circuitclosercarried by said standard and connected in said supplemental circuit,means carried by the arm for moving said circuit-closer to its closedposition at times, a holding-magnet in the main circuit for holding saidcircuit-closer in said closed position, and means for checking themovement of said arm.-

11. A signal apparatus comprising the com.- bination with a main and asupplemental circuit, each including a source of electric energy and acontrolling-switch in the main circuit; ot' a semaphore, said semaphorecomprising a supporting-standard and housing rotatably mountedthereover, an arm pivotally mounted within the housing on said standard,and projected through the periphery of the housing, a signal-holdingblade secured to the arm, lock devices mounted on said standard forholding said arm in one position, said arm being gravity-movable to itsother position, an electromagnet operated by the main circuit forreleasing said lock devices to permit the arm to operate and rotate thecasing, and a circuit-closer in the supplemental circuit, mounted withinthe casing and controlled by said arm and by the main circuitsubstantially as shown and described.

12. A signal apparatus comprising the combination with a main and asupplemental circuit, each including a source of electric energy and acontrolling-switch in the main circuit; of a semaphore, said semaphorecomprising a supporting-standard and housing rotatably mountedthereover, an arm pivotally mounted within the housing on said standard,and projected through the periphery of the housing, a signal-holdingblade secured to the arm, lock devices mounted on said standard forholding said arm in one position, said arm being gravity-movable to itsother position, an electromagnet operated by the main circuit forreleasing said lock devices to permit the arm to drop and rotate thecasing, and a circuit-closer in the supplemental circuit, mounted withinthe casing and controlled by said arm and by the main circuit, and meansfor checking the movement of the arm and the casing.

13. A signaling apparatus comprising the combination with a main and asupplemental circuit, each including a source of electric energy and acontrolling-switch in the main circuit; of a semaphore, said semaphorecomprising a supporting-standard a housing rotatably mounted thereover,an arm pivotally mounted within the housing on said standard, andprojected through the periphery of the housing, a signal-holding bladesecured to the arm, lock devices mounted on said standard for holdingsaid arm in one position, said arm being gravity-movable to its otherposition, an electromagnet operated by the main circuit for releasingsaid lock devices to permit the arm to drop and rotate the casing, acircuitcloser in the supplemental circuit, mounted within the casing andcontrolled by said arm and by the main circuit, and means for checkingthe movement of the arm and the casing, said means comprising a dash-potconnected with the arm and mounted on the standard within the casing.

14. Asignal apparatus comprising the combination with a main and asupplemental circuit, including a source of electric energy, and acontrolling-switch in the main circuit; of a semaphore, said semaphorecomprising a supporting-standard, a housing rotatably mounted thereover,an arm pivotally mounted within the housing on said standard, andprojected through the periphery of the housing, a signal-holding bladesecured to the arm, lock devices mounted on said standard for holdingsaid arm in one position, said arm being gravity-movable to its otherposition, an electromagnet operated by the main circuit for releasingsaid lock devices to permit the arm to operate and rotate the casing,and a circuit-closer in the supplemental circuit, mounted within thecasing and controlled by said arm and by the main circuit, a lampmounted within the casing, said casing having windows adapted toregister with said lamp when the casing has been rotated.

15. A signal apparatus comprising the combination with a main and asupplemental circuit, including a source of electric energy, and acontrolling-switch in the main circuit; of a semaphore, said semaphorecomprising a supporting-standard, a housing rotatably mounted thereover,an arm pivotally mounted within the housing on said standard, andprojected through the periphery of the housing, a signal-holding bladesecured to the arm, lock devices mounted on said standard for holdingsaid arm in one position, said arm being gravity movable to its otherposition, an electromagnet operated by the main circuit for releasingsaid lock devices to permit the arm to operate and rotate the casing,and a circuit-closer in the supplemental circuit, mounted within thecasing and controlled by said arm and by the main circuit, a lampmounted within the casing, said casing having windows adapted toregister with said lamp when the casing has been rotated, and a dashpotconnected with the arm and mounted on the standard within the casing forchecking the movement of the arm substantially as shown and described.

16. An electric semaphore comprising the combination with a main circuitincluding a source of electric energy and a cut-out, and a supplementalcircuit including a source of electric energy and an indicator; of asupport, a housing rotatably mounted thereon, said housing comprisingside walls and a peripheral rim, said rim including parts hingedtogether to form doors, said rim havingaslot for the passage of saidsupport, and said side walls having windows, a semaphore-arm pivoted tosaid support within the casing, and an arc-bar carried by said arm andpassing through said support, said arc-bar having a notch, a tumblerpivotally mounted on said support to engage said notch, said tumblerhaving a flat portion, an electromagnet mounted on said standard andconnected in the main circuit, an armature for said electromagnet,connections between said armature and said tumbler whereby the movementof the armature will rock the tumbler and a circuit-closer within saidhousing for the supplemental circuit, closable when the arm has moved toits danger position substantially as shown and described.

17. An electric semaphore comprising the combination with a main circuitincluding a source of electric energy and a cut-out switch in saidcircuit, and a supplemental circuit including a source of electricenergy and an indicator; of a standard, a housing rotatably mountedthereon, said housing comprising side walls, and a peripheral rim, saidrim including parts hinged together to form doors, said rim having aslot for the passage of said standard, and said side walls havingwindows, a semaphore-arm pivoted to said standard within the casing, andan. arc-bar carried by said arm and passing through said standard, saidarc-bar having a notch, a tumbler pivotally mounted on said standard toengage said notch, said tumbler having a fiat portion, an electromagnetadjustably mounted on said standard, an armature for said electromagnet,connections between said armature and said tumbler whereby the movementof the armature will rock the tumbler, and a circuit closer within saidhousing for the supplemental circuit, closable when the semaphore hasmoved to its danger position, substantially as shown and described.

18. An electric semaphore comprising the combination with a main circuitincluding a source of electric energy and a cut-out switch in saidcircuit, and a supplemental circuit including a source of electricenergy and an indicator; of a standard, a housing rotatably mountedthereon, said housing comprising side walls, and a peripheral rim, saidrim including parts hinged together to form doors, aslot for the passageof said standard, and said .side walls having windows, a semaphorearmpivoted to said standard within the easing, and an arc-bar carried bysaid arm and passing through said standard, said. arc-bar having anotch, a tumbler pivotally mounted on said standard to engage saidnotch, said tumbler havinga flat portion, an electromagnet mounted onsaid standard and connected in the main circuit, an armature for saidelectromagnet, connections between said armature and said tumblerwhereby the movement of the armature will rock the tumbler, bracketmembers secured to said standard, a holding electromagnet secured tosaid bracket members and connected in the main circuit, an armature forsaid holding-magnet connected in the supplemental circuit, a fixedcontact in the supplemental circuit mounted on the bracket members forcooperating with the holding-magnet armature and normally separatedtherefrom, means carried by the arm for moving said holding-magnetarmature into engagement with said magnet to cause the armature toengage said fixed con tact to close the supplementalcircuitsubstantially as shown and described.

19. An electric semaphore comprising the combination with a main circuitincluding a source of electric energy and a cut-out switch in saidcircuit, and a supplemental circuit including a source of electricenergy and an indicator; of a standard, a housing rotatably mountedthereon, said housing comprising side walls, and a peripheral rim, saidrim including parts hinged together to form doors, a slot for thepassage of said standard, and

said side walls having windows, a semaphorearm pivoted to said standardwithin the easing, and an arc-bar carried by said arm and passingthrough said standard, said arc-bar having a notch, a tumbler pivotallymounted on said standard to engage said notch, said tumbler having aflat portion, an electromagnet mounted on said standard and connected inthe main circuit, an armature for said electromagnet, connectionsbetween said armature and said tumbler whereby the movement of thearmature will rock the tumbler, bracket members secured to saidstandard, a holdingelectromagnet secured to said bracket members andconnected in the main circuit, an armature for said holding-armconnected in the supplemental circuit, a fixed contact in thesupplemental circuit mounted on the bracket members for cooperating withthe holdingmagnet armature and normally separated therefrom, meanscarried by the arm for moving said holding magnet armature intoengagement with said magnet to cause the armature to engage said fixedcontact to close the supplemental circuit, means adjustably mounted onthe standard within the casing for checking the movement of the armsubstantially as shown and described.

20. An electric semaphore comprising the combination with a main circuitincluding a source of electric energy and a cut-out switch in saidcircuit, and a supplemental circuit including a source of electricenergy and an indicator; of a standard, a housing rotatably mountedthereon, said housing comprising side walls, and a peripheral rim, saidrim including parts hinged together to form doors, a slot for thepassage of said standard, and said side walls having apertures,asemaphorearm pivoted to said standard within the easing, and an arc-barcarried by said arm and passing through said standard, said arc-barhaving a notch, a tumbler pivotally mounted on said standard to engagesaid notch, said tumbler having a flat portion, an electromagnet mountedon said standard and connected in the main circuit, an armature for saidelectromagnet connections between said armature and said tumbler wherebythe movement of the armature will rock the tumbler, bracket memberssecured to said standard, a holdingelectromagnet secured to said bracketmembers and connected in the main circuit, an ar mature for saidholding-magnet connected in the supplemental circuit, a fixed contact inthe supplemental circuit mounted on the bracket members for cooperatingwith the holding-magnet armature and normally separated therefrom, meanscarried by the arm for moving said holding-magnet armature intoengagement with said magnet to cause the armature to engage said fixedcontact to close the supplemental circuit, means adjustably mounted onthe standard within the easing for checking the movement of the arm, a

lamp mounted within the housing, said hous ing having transparentcolored-glass windows for registering with the lamp when the casing isturned to its danger-indicating position, and means for turning thecasing substantially as shown and described.

21. A semaphore comprising the combination with a main and asupplemental circuit each including a source of electric energy, of asupport comprising a pair of parallel bars, an arm pivotally securedtherebetween, an arcbar secured to and movable with said arm and passingbetween said supporting-bars, a roller mounted above said arc-barbetween said supporting-bars, a tumbler fulcrumed between saidstandard-bars and below said arc-bar, said arc-bar having atumbler-receiving notch, a lever connected to said tumbler, a secondlever fulcrumed between the supporting-bars below said tumbler, a pitmanconnecting said levers, an armature on said second lever, anelectromagnet in the ,main circuit-and mounted on said standard foroperating said lever-armature, a bracket secured to the supporting-bars.a fixed contact member in the supplemental circuit and mounted on saidbracket, the movable contact member having an armature portion, aholding-magnet also in the main circuit for holding said fixed andmovable contact members together, means carried by the arm for movingsaid movable contact into engagement with said fixed contact, a checkdevice mounted on the standard for checking the movement of the armsubstantially as shown and described.

22. A semaphore comprising the combination with a main and asupplemental circuit each including a source of electric energy, .of asupport comprising a pair of parallel bars, an arm pivotally securedtherebetween, an arcbar secured to and movable with said arm and passingbetween said supporting-bars, a roller mounted above said arc-barbetween said supporting-bars, a tumbler fulcrumed between saidsupporting-bars and below said arc-bar, said arc-bar having atumbler-receiving notch, a lever connected to said tumbler, a secondlever fulcrumed between the supporting-bars below said tumbler, a pitmanconnecting said levers, an armature on said second lever, anelectromagnet connected in the main circuit and mounted on said standardfor operating said lever-armature, a bracket secured to thesupporting-bars, a fixed contact member and a movable contact member inthe supplemental circuit and mounted on said bracket, the movablecontact member having an armature por tion, a holding-magnet also in themain circuit for holding said fixed and movable contact members closed,means carried by the arm for moving said movable contact into engagementwith said fixed contact, a check device mounted on the standard forchecking the movement of the arm, a third bracket secured to thestandard, a lamp carried by said bracket, a casing rotatably mounted onthe standard and inclosing the parts carried by the standard, saidcasing having apertures to register with the lamp at predeterminedtimes, substantially as shown and described.

CLAYTON E. FREDERIOKSON.

Witnesses:

L.- F. CRAWFORD, JEAN F. WEBB, Jr.

